Bump hardhat-gas-reporter from 2.1.1 to 2.2.0 in /bridge

Bumps [hardhat-gas-reporter](https://github.com/cgewecke/hardhat-gas-reporter) from 2.1.1 to 2.2.0.
- [Release notes](https://github.com/cgewecke/hardhat-gas-reporter/releases)
- [Changelog](https://github.com/cgewecke/hardhat-gas-reporter/blob/master/CHANGELOG.md)
- [Commits](cgewecke/hardhat-gas-reporter@v2.1.1...v2.2.0)

---
updated-dependencies:
- dependency-name: hardhat-gas-reporter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]